Spec-Zone .ru
спецификации, руководства, описания, API
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CONTENTS | PREV | NEXT | Java Remote Method Invocation |
java.rmi.server.UnicastRemoteObject
, thereby
inheriting the remote behavior provided by the classes
java.rmi.server.RemoteObject
and
java.rmi.server.RemoteServer
.BankAcctImpl
implements the
BankAccount
remote interface and extends the
java.rmi.server.UnicastRemoteObject
class:
package mypackage; import java.rmi.RemoteException; import java.rmi.server.UnicastRemoteObject; public class BankAccountImpl extends UnicastRemoteObject implements BankAccount { private float balance = 0.0; public BankAccountImpl(float initialBalance) throws RemoteException { balance = initialBalance; } public void deposit(float amount) throws RemoteException { ... } public void withdraw(float amount) throws OverdrawnException, RemoteException { ... } public float getBalance() throws RemoteException { ... } }Note that if necessary, a class that implements a remote interface can extend some other class besides
java.rmi.server.UnicastRemoteObject
.
However, the implementation class must then assume the
responsibility for exporting the object (taken care of by the
UnicastRemoteObject
constructor) and for implementing
(if needed) the correct remote semantics of the
hashCode
, equals
, and
toString
methods inherited from the
java.lang.Object
class.